Can you be more specific? After visiting China and Vietnam and seeing the very difficult and tiring conditions people have to endure as a way of life, I don't t

Can you be more specific? After visiting China and Vietnam and seeing the very difficult and tiring conditions people have to endure as a way of life, I don't think the elderly there can say they're in good shape or physically fit. Most likely you were only exposed to older people who were still physically fit enough to continue being able to provide for themselves, and never saw the vast majority of people in their 50s and 60s who are permanently physically impaired.